VDIM6020 - Interest adjustments: When to use Form VAT663

This guidance deals with interest matters in respect of prescribed accounting periods starting on or before 31 December 2022. Interest matters with effect from 01 January 2023 are dealt with under Finance Act 2009.

Please see Compliance Handbook page CH140000 onwards to find the new interest rules guidance.

VDIM7000 (when to inhibit, amend or withdraw interest) describes the type of situations when you may need to use this form to amend interest. Cases where it is appropriate to increase interest will be rare and in such cases you should ask Tax Administration, Litigation and Advice (TALA) for advice, see VDIM1040.

You should not use the VAT663 to

• amend interest due to misappropriation of a remittance. or
• inhibit interest or reinstate inhibited interest for a whole assessment or whole lines of an assessment unless a recovery assessment is involved, see VDIM4040.